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Note: The temperature probe is fitted with a type K mini connector. A mini connector to banana 
connector adaptor is supplied for connection to the input banana jacks. 
 

SPECIFICATIONS 

Technical: 
Insulation:

   

 

 

 

Class2, Double insulation. 

Overvoltage category

:  

CATIV 600V,CATIII 1000V  

 
NOTE: These meters meet CAT III and CAT IV IEC 61010 standards. The IEC 61010 safety standard 
defines four overvoltage categories (CAT I to IV) based on the magnitude of danger from transient 
impulses. CAT III meters are designed to protect against transients in fixed-equipment installations 
at the distribution level; CAT IV meters are designed to protect against transients from the primary 
supply level (overhead or underground utility service). 
 

Maximum voltage between any terminal and earth ground: 

 

1000V DC/AC RMS 

Surge Protection:   

 

 

 

 

 

 

 

 

 

 

 

8kV peak IEC 61010 

 

AC True RMS

: The term stands for “Root-Mean-Square,” which represents the method of calculation 

of the voltage or current value. Average responding multimeters are calibrated to read correctly 
only on sine waves and they will read inaccurately on non-sine wave or distorted signals. True rms 
meters read accurately on either type of signal. 
 

Display:

 

 

 

 

 

 

 

 

4000 counts LCD display, 21mm high 

Polarity:

    

 

 

 

 

 

 

Automatic, (-) negative polarity indication. 

Over-range:

    

 

 

 

 

 

“OL” mark indication. 

Low battery indication:  

 

A battery “     “ symbol is displayed when the battery 
voltage drops below the operating level. 

Measurement rate: 

 

 

 

 

2 times per second nominal. 

Auto power off:

 

 Meter automatically shuts down after approx. 30 minutes of 
inactivity. 

Operating environment:

   

 

 

-10 

o

C to 50 

o

C (14 

o

F to 122 

o

F) at < 70 % relative humidity. 

Storage temperature:

 

 -30 

o

C to 60 

o

C (-4

 o

F to 140

 o

F) at < 80 % relative 

humidity.to 

Relative humidity: 

 

 

 

 

90% (0

o

C to 30

o

C); 75%(30

o

C to 40

o

C); 45%(40

o

C to 50

o

C); 

For inside use, max height: 

 

Operating:3000m, Storage 10,000m 

Pollution degree:

   

 

 

 

 

Safety:  

 

The instrument complies with IEC 61010-1:2001 and IEC, 
61010-031:2002 

Power:

  

 

 

 

 

 

 

 

One 9V battery , NEDA 1604, IEC 6F22. 

Dimensions:

    

 

 

 

 

 

182 (H) x 82 (W) x55 (D) mm 

Weight: Approx.: 375g. 
 
ACCURACY 

Accuracy is given at 18 

o

C to 28 

o

C (65

 o

F to 83

 o

F), less than 70 % RH

 

 

 

Summary of Contents for AX-155

Page 1: ...TRUE RMS AUTORANGING DIGITAL MULTIMETER Model AX 155 INSTRUCTION MANUAL...

Page 2: ...ies recommend the use of fused test leads when measuring voltage on high energy systems Replacement fuses must be of the correct type and rating The instrument must not be used if any part of it is da...

Page 3: ...turn the range knob from the OFF position to any measurement range Note For best battery life ALWAYS turn the function switch to the OFF position when the meter is not in use This meter has Auto OFF...

Page 4: ...o normal AUTO measurement mode hold down the MAX MIN button for 2 seconds Peak Hold button The Peak Hold function captures the peak AC or DC voltage or current The meter can capture negative or positi...

Page 5: ...g into the negative COM jack 2 For current measurements up to 4000uA DC set the function switch to the uA position and insert the red test lead banana plug into the uA jack 3 For current measurements...

Page 6: ...til appears in the display 4 Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with...

Page 7: ...citance measurement time can be several minutes before the final reading stabilizes The bar graph is disabled in capacitance measurement mode The LCD displays DIS C Discharging through the chip is qui...

Page 8: ...value Average responding multimeters are calibrated to read correctly only on sine waves and they will read inaccurately on non sine wave or distorted signals True rms meters read accurately on either...

Page 9: ...0mV 0 1mV 0 8 of rdg 3 digits 4 000V 1mV 40 00V 10mV 400 0V 100mV 1000V 1V 1 2 of rdg 5 digits Input Impedance 7 8M AC Response True RMS 50 Hz 60Hz Maximum Input 1000V dc or 1000V ac rms DC Current A...

Page 10: ...rms on mA 10A ac rms on 10A range Resistance Auto ranging Range Resolution Accuracy 400 0 0 1 0 8 of rdg 5 digits 4 000k 1 0 8 of rdg 2 digits 40 00k 10 400 0k 100 4 000M 1k 2 5 of rdg 8digits 40 00M...

Page 11: ...Resolution Accuracy 20 o C 760 o C 1 o C 3 of rdg 5dgts 4 o F 1400 o F 1 o F 3 of rdg 9dgts Sensor Type K Thermocouple Overload protection 1000V dc or ac rms Diode Test Test current Resolution Accurac...

Page 12: ...sing a Phillips head screwdriver 3 Insert the battery into battery holder observing the correct polarity 4 Put the battery cover back in place Secure with the two screws NOTE If your meter does not wo...

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